Aiken Arch

An approximately 8' span of basalt that forms a natural arch. This area, the
Cinder Cones National Natural Landmark
was created in two separate geologic periods which began several million
years ago and ended with the melting of the large continental glaciers creating the modern climatic
pattern about 11,500 years ago. Volcanic activity in the region most likely occurred
as recently as 8000 years ago.